Find the sum of the first n terms in the series: (i) 1.3.5 + 3.5.7 + 5.7.9 + ... + (2n - 1)(2n + 1)(2n + 3) (ii) 1/(1.3.5) + 1/(3.5.7) + 1/(5.7.9) + ... + 1/[(2n - 1)(2n + 1)(2n + 3)]
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Hello, cedricc! The first one is rather straight-forward. Find the sum of the first terms in the series: . . We have: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hi For the second one Most of the terms cancel out After simplifications
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